After your Beautyrest® product is delivered, go to beautyrestpromo.com, enter the serial number found on the law tag of your mattress or on the frame of your adjustable base to redeem your FREE Beautyrest® Sleeptracker® monitor. Valid with an eligible Beautyrest Black® or Beautyrest Silver™ Hybrid mattress purchased at Metro Mattress while supplies last. See store sales associate for more details.